The price of plain lead is still hovering around $.98-1.00 I believe, so that price and quantity comes out to 83.3 cents per pound. Not bad at all, but I'm sure you could do better somewhere. The real question I would have is how hard is this lead to extract from the keel into a usable form?
I assume you're using this for reloading. I don't yet reload, but I understand that a lot of guys put some other metal into the lead when they cast it to harden it a bit, maybe antimony. Have to factor that into total cost if applicable.